Extra-solar planet imaging: ground vs space based coronagraphs


Charles Hanot (1), Olivier Absil (1), Anthony Boccaletti (2), Christophe Vérinaud (3), Jean Surdej (1)


(1) Institut d’Astrophysique et de Géophysique, ULg; (2) LESIA, Observatoire de Paris Meudon; (3) LAOG


In the context of exoplanet detection, a large majority of the 400 detected exoplanets have been found by indirect methods. Today, progress in the field of high contrast and angular resolution imaging has allowed direct images of several exoplanetary systems to be taken (cf. HR 8799, Fomalhaut and β Pic). In the near future, several new instruments are going to dramatically improve our sensitivity to exoplanet detection. Among these, SPHERE (Spectro Polarimetric High contrast Exoplanet REsearch) at the VLT, MIRI (Mid Infra-Red Instrument) onboard JWST and EPICS at the ELT will be equipped with coronagraphs to reveal faint objects in the vicinity of nearby stars. We made use of the Lyon group (COND) evolutionary models of young (sub-)stellar objects and exoplanets to compare the sensitivities of these different instruments using their estimated coronagraphic profiles. From this comparison, we present a catalogue of targets which are particularly well suited for the different instruments.

Attached documents

Lyot2010proc s7 talk HanotC.pdf
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